Means for -and wffkcb-cf-elktrtgmotive-foroe regulation



Na. 620,365. .Patnted Feb. 28, |899.

A.N. nuwe. l MEANS FR AND METHOD 0F ELECTRUMOTIVE FORCE REGULATION.(Appumian am 15d. n1, issn.)

(Ne: Model.) 2 Sheds-Shui l.

Ziyi' Patentd Fab. 2a, |899.

N. RWE. MEANS F08 AND NETHUD 0F ELECTROHDTIVE FORCE REGULATION.

ed an.

(Appummn n1 .r 27,1390.)

2 Shoets--Sheei 2.

(No Model.)

/NVENTOH M 'Cwf,

1UNITED STATES PATENT OFFICE.

NORMAN ROWE, OF W'ILKINSBURG, yl?ENNSYLVANIA, ASSIGNOR TO THEWESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, F

PENNsYLvANiA.

MEANS FR ANU-aiETHGD-QPELECTilGMOTlVEFORCE HEGULATIGN.

SPEULFIQATION forming part of Letters Patent No. 620,365, dated February28, 1899.

Y electr-emotive force of the work-circuit.

The object of my invention is to provide a method of and means forincreasing or decreasing the workaeirc uit electromotiv'e forcegradually over any desired vrange without undue expense and complicationas regards either the strnctn re or operation of the appa ratusemployed. Y

'Among the I nethods heretofore proposed for varying the electromotiveforce in alternating-current work-circuits supplied directly bystationary transformers perhaps the most usual is that' which involvesvarying the active length of either the primary or the secondarytransformer-windingbymeansofsuitable switch devices.

In dealing with large transformersand high.

electromotive forces this method involves the employment of either anexcessively large and practically prohibitive number of switchcontactfpoints and corresponding divisions of the transformer-winding'or excessively large and abrupt changes in the electrom'otive forcebetween successive divisions of the ,transformenwinding. It has alsobeen proposed to vary the work-circuit electromotive force by means of,a regulator having two inductively-related windings which may berelstively adjusted in position, so as to magnetlcally vary theelectromotive force. This method fails to satisfactorily meet all therequirements of a normally high voltage circuit in which a wide range ofvariation is desired, chiefly on account of the size and-structure ofthe regulator which it ,is necessary to employ for such'purpose and theconsequent torque to be overcome in operating it.

In order to secure the desired range of regnyeach revolution ofswitch-arm D'.

pplicatlen Bled J'anulry27,189b Bofill F0. 888,171. (No modul.)

.lation advantageously both as' regards the character of theapparatusemployed and the results eiected, I have devised the method`and means illustrated in the accompanying drawings, in Wh'ich- Figure lis a front elevation of the inductive regnlator, and Fig. 2 adiagram'oflthe entire apparatus employed. Fig. 3 is a diagramillustrating the action of the inductive regulator.

In the drawings, A andI B are the supply alternating-current mains; C, astationary transformer; D, a stationary switch base or plate; E, aninductive regulator, and F and G the Work-circuit mains.

For the purpose of carrying out myinvention I have shown theswitch-plate D as provided with an outer contact-ring d, an innercontactring ci', an outery set. of contact-segments 1, 3, 5, and 7, ands similar set of inner contact-segments 2, 4, 6, and 8,'the segments ofeach set being spaced apart and alternating, as regards radialposition', witli those of the other. A switch-arm D is snitably fastenedto one end of a shaft/D2 at the center of the switch-plate D andisprovided with two brushes e2 and e. The brush e2 is so' locatedas tomake contact with ring CZ 'at all times and also with each ofcontactsegments 1, 3, 5, and 7 during a portion of The brush eis so.located as' to make contact with ring d' at all times and with each ofcontact-segments 2, 4, G, and 8 during a portion of each revolution ofarm D', the relation of the two sets of segments being snch that eachbrush comes 'nto contact with a corresponding segment j' st before theother brush breaks Contact with its segment. The

switch-plate D is also .provided with a stoppinf in position to beengaged by a lugf' on thearm D' when the latter, is in either its firstor its last position.

' TheA primary c of the transformer C is provided with leads 1, 2*, 3*,fi, 5, 6*, 7, and 8 at regular intervals extending over a portion of itslength, which are respectively connected to. the contact-segments 1, 2,3, 4, 5, 6, 7, and 8. '.Au end= lead 9* constitutes the terminal of theline conductor The wind' '23o primary upon 't cadeau a -ing o f thes'eeo'ndary member e' of 1 the regu- .lator is connected at one :l toring d and at the other cud to ring d', the latter of which 3, and thethe line conductor substantially that movement of switch-arm D' is'connected across the seccut out that port-ion ofthe.transfonn erprimary betweenleads 3 and 4*. Il' thefmo'vement of the arm Dbecontinued'until its lug f' comes into contact with the stop-pin fon theswitchplate D, the line lectromotive `.line electromotive force will becorresponding to lead 4.

g and g and brushes h and h2 As illustrated in Fig. 1 of thc-drawings,the primary members of the regulator Esupports the rings g and g and ismounted upon' the `nlmft Dof the switch, so as to rotate with' it .asthe switch-arm' Dis revol'ved.- In the coli- |5 struction shown theregulator has eight magnetic poles; but any other .number that isfounddesirable and practicable may be employed by suitably modifying theswitching devices.

The operation of my invention isasfollows: .-lssuming. that theswitch-arm' D' 'and the inem'bereof the ind notion-regulatorare ln thepositions indicated in the drawings, so that the regulator produces amaximumQ-inductive ef- :.5 feet in opposition to the main-lineelectromotive force, asis indicated at m in Fig. 3, if the' the movablemember e of the regulater be turned in aclockwise direction, so as I togradually vary the inductive eEect of the he secondary to and throughzero (represented byzin Fig. 3 to a maximum positive value, (indicatedatm in said lign re,) the main-line Fig'.A 2, to point z, correspondingto lead 5.,

and then to point m, 6, then opposed from ing to lead 6*, to. point f,correspondingto lead 7", and then 'boosted td point m7, correspending tolead 8.

fore,l that the line electromotive force is raised by means ofprogressivelyincrements instead of by means of abranpt steps or jumps,

point m, correspondforce may bedocreased arm D in the opposi readydescribed. l

If a greater range of 'electromotivel-force regulation is desired thanis atforded by-.the construction indicated in the drawings, itmsvobviously be secured by providing the requito the point z and will thengradually increased an equal amount, (represented by the line z m'.)When this maximum, corre spending to point2 in Fig. 2, is reached, 4obrush e2 will be in contact with segment 1 and brush e with segment 2momentarily. In this positionthe section 1 Zand the windl e'of theregu'- and the switch whereby the switch-arm is intermittingly actuatedwhen the movable memvber of the regulator reaches the proper positionfor cutting a section of the transformerwindinginto or out ofcircnit.

I desire it to be u Aare cutout of circuit. be maintained until brushelreaches segduring this interval the action of E is represented by thebroken there being no resulting elfect I claim as my invention` l. yThemethod of raisin electromotvefforce supplie bya transformer having awindi ing opposedby is variable,

corresponding which decreases to lead 3f be 'theregnlatorE byan amountSindicated by the full' C5 ne position of arm is reached,-when itsspond'ing toa different length, and. then -ellect 1s m1. From this pointthe line elecchanging the circuit connections to corre snond to theladjusted electromotive force. l

tromotive force is boosted until brush ae" 'corresponding 'to lead.

will

roo

means intermediate the induction-regulator .rio

nderstood thatvariation h 2. The method of varying the electromotive I'force supplied by a transformer having a winding the active length ofwhich is variabile, which consists in first inductvely va- 5 ,rying theelectromotive force within limits corresponding to n division of'thewinding,-

@the'n cutting such division either into or ont oftpircuit aud'repeatingsuch operations un- .till-he desn'ed change in electromotive force is :osecured.

23.' -The combination with a stationary transformer having a. dividedwinding, of a switch ;r s`vr'itchcs'for cutting the divisions of thedngiato niet cirl1-itls9aqeasively,

.2i-1l@ 9' 'v'.ly .varying thev electr linotilve'.J1 orce'd"etwenwperations of the tchy'fhicli effe changes in the length of i ,mgl-7. Y l -In"asyst m'of electrical-distribution, a 2ostationaiyetigl-nsformer in .combination with a's'w'itcli "r'sivitchesfor varying theactive of'fthe transformerfwindings by successive stepsand an inductive regulator for varying,r the electrornotive forcebetween certain of said steps, whereby the working electromotive forceis gradually varied be- 4tween maximum and minimum limits.

vte ,thc'next lead in the series prior to connecting such leadwiththe'dine conductor.

' In testimony whereof-.I have hereunto subscribed my name thisllith dayof January,

NORMAN ROWE. Vitnesses:

JAMES' B. YOUNG, I-I. C. TENER.

